THE FRACTAL CHARACTERISTICS OF ROCK FRACTURE IN DAM FOUNDATION OF THE THREE GORGES PROJECT UNDER UNIAXIAL COMPRESSION
单轴压缩条件下三峡坝基岩石破裂的分形特征

The fractal structure of rock fracture in dam foundation of the Three Gorges Project under uniaxial compression is studied based on fractal theory. The results show that the fracture system and the main fractures of rock under uniaxial compression tests are of highly self similar characteristic in statistics. The fractal dimension values of rock fracture raise with increase of pressure. The fractal dimension can be taken as a parameter to describe the process of rock fracture and there are good correlation among fractal dimension of rock fracture, uniaxial compressive strength and rock weathering degree. The fractal dimensions reflect the formational and evolutional features of rock fractures and the difference of rock weathering.